I had (2) bad experiences with Rodent Pro. Their feeders were soiled and smelled of urine. I've used Perfect Prey for the last few years without issues. The feeders are all within the advertised weight ranges with pretty good diversity in size. They're my go to supplier these days. The jumbo mice are cool for your BP now but I agree with you on trying to get him on rats soon. It can be frustrating but most will make the transition in time. It might take some tough love though.